A concise step by step guide on how to setup React.js on MacOS. In a few steps, you will install Visual Studio Code, Node.js, NPM, Git, Prettier and create-react-app for building React applications with Mac OS. React Native has several of the most critical platform components already wrapped, like ScrollView and TextInput, but not all of them, and certainly not ones you might have written yourself for a previous app. Fortunately, we can wrap up these existing components for seamless integration with your React Native application. React makes it painless to create interactive UIs. Design simple views for each state in your application, and React will efficiently update and render just the right components when your data changes. Declarative views make your code more predictable and easier to debug. May 26, 2019 Install React on macOS X; Install React on Ubuntu; After creating a React application, open the project using a code editor. I recommend the VS code for this. Adding Bootstrap(optional) This is an optional step for styling our React application by adding Bootstrap CDN to the index.html file inside /public directory. React processes only user interface in applications. It is simply a JavaScript runtime. Lightweight, fast and modern way to execute code on your computer. Why do internet giants use ReactJS? Although partially, Facebook is making use of ReactJS. Their webpage is built with React, as the script that is blended in the application code. So, if your package.json says 'react': '^15.0.0' and you run npm update react your package.json will now say 'react': '^15.6.2' (the currently latest version of react 15). But since you want to go from react 15 to react 16, that won't do. Latest version regardless of your semver: npm install -save react@latest.
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React is a JavaScript library for building user interfaces.
React is used to build single page applications.
React allows us to create reusable UI components.
Start learning React now »Learning by Examples
Our 'Show React' tool makes it easy to demonstrate React, it shows both the code and the result.
Create React App
In order to learn and test React, you should set up a React Environment on your computer.
This tutorial uses the
create-react-app
.The
create-react-app
is an officially supported way to create React applications.If you have NPM and Node.js installed, you can create a React application by first installing the create-react-app.
Install create-react-app by running this command in your terminal:
C:UsersYour Name>npm install -g create-react-app
You are now ready to create your first React application!
Run this command to create a React application named
myfirstreact
: C:UsersYour Name>npx create-react-app myfirstreact
The
create-react-app
will set up everything you need to run a React application.Note: This tutorial uses
create-react-app
to demonstrate React examples. You will not be able to run the same examples on your computer if you do not install the create-react-app
environment.Run the React Application
If you followed the two commands above, you are ready to run your first real React application!
Run this command to move to the
myfirstreact
directory:Run this command to execute the React application
myfirstreact
:A new browser window will pop up with your newly created React App! If not, open your browser and type
localhost:3000
in the address bar.The result:
You will learn more about the create-react-app in the React Get Started chapter.
What You Should Already Know
Before starting with React.JS, you should have intermediate experience in:
- HTML
- CSS
- JavaScript
You should also have some experience with the new JavaScript features introduced in ECMAScript 6 (ES6), you will learn about them in the React ES6 chapter.
This page will help you install and build your first React Native app. If you already have React Native installed, you can skip ahead to the Tutorial.
If you are new to mobile development, the easiest way to get started is with Expo CLI. Expo is a set of tools built around React Native and, while it has many features, the most relevant feature for us right now is that it can get you writing a React Native app within minutes. You will only need a recent version of Node.js and a phone or emulator. If you'd like to try out React Native directly in your web browser before installing any tools, you can try out Snack.
If you are already familiar with mobile development, you may want to use React Native CLI. It requires Xcode or Android Studio to get started. If you already have one of these tools installed, you should be able to get up and running within a few minutes. If they are not installed, you should expect to spend about an hour installing and configuring them.
Assuming that you have Node 10 LTS or greater installed, you can use npm to install the Expo CLI command line utility:
Then run the following commands to create a new React Native project called 'AwesomeProject':
This will start a development server for you.
Running your React Native application
Install the Expo client app on your iOS or Android phone and connect to the same wireless network as your computer. On Android, use the Expo app to scan the QR code from your terminal to open your project. On iOS, follow on-screen instructions to get a link.
Modifying your app
Now that you have successfully run the app, let's modify it. Open
App.js
in your text editor of choice and edit some lines. The application should reload automatically once you save your changes.That's it!
Congratulations! You've successfully run and modified your first React Native app.
Now what?
Expo also has docs you can reference if you have questions specific to the tool. You can also ask for help at Expo forums.
These tools help you get started quickly, but before committing to building your app with Expo CLI, read about the limitations.
If you have a problem with Expo, before creating a new issue, please see if there's an existing issue about it:
- in the Expo CLI issues (for issues related to Expo CLI), or
- in the Expo issues (for issues about the Expo client or SDK).
If you're curious to learn more about React Native, continue on to the Tutorial.
Running your app on a simulator or virtual device
Expo CLI allows you to run your React Native app on a physical device without setting up a development environment. If you want to run your app on the iOS Simulator or an Android Virtual Device, please refer to the instructions for 'React Native CLI Quickstart' to learn how to install Xcode or set up your Android development environment.
Once you've set these up, you can launch your app on an Android Virtual Device by running
npm run android
, or on the iOS Simulator by running npm run ios
(macOS only).Caveats
Because you don't build any native code when using Expo to create a project, it's not possible to include custom native modules beyond the React Native APIs and components that are available in the Expo client app.
If you know that you'll eventually need to include your own native code, Expo is still a good way to get started. In that case you'll need to 'eject' eventually to create your own native builds. If you do eject, the 'React Native CLI Quickstart' instructions will be required to continue working on your project.
Expo CLI configures your project to use the most recent React Native version that is supported by the Expo client app. The Expo client app usually gains support for a given React Native version about a week after the React Native version is released as stable. You can check this document to find out what versions are supported.
If you're integrating React Native into an existing project, you'll want to skip Expo CLI and go directly to setting up the native build environment. Select 'React Native CLI Quickstart' above for instructions on configuring a native build environment for React Native.
Follow these instructions if you need to build native code in your project. For example, if you are integrating React Native into an existing application, or if you 'ejected' from Expo, you'll need this section.
The instructions are a bit different depending on your development operating system, and whether you want to start developing for iOS or Android. If you want to develop for both Android and iOS, that's fine - you can pick one to start with, since the setup is a bit different.
Development OS:
Unsupported
A Mac is required to build projects with native code for iOS. You can follow the Quick Start to learn how to build your app using Expo instead.
Installing dependencies
You will need Node, Watchman, the React Native command line interface, and Xcode.
While you can use any editor of your choice to develop your app, you will need to install Xcode in order to set up the necessary tooling to build your React Native app for iOS.
Installing dependencies
You will need Node, Watchman, the React Native command line interface, a JDK, and Android Studio.
Installing dependencies
You will need Node, the React Native command line interface, a JDK, and Android Studio.
Installing dependencies
You will need Node, the React Native command line interface, Python2, a JDK, and Android Studio.
While you can use any editor of your choice to develop your app, you will need to install Android Studio in order to set up the necessary tooling to build your React Native app for Android.
Node & Watchman
We recommend installing Node and Watchman using Homebrew. Run the following commands in a Terminal after installing Homebrew:
If you have already installed Node on your system, make sure it is Node 8.3 or newer.
Watchman is a tool by Facebook for watching changes in the filesystem. It is highly recommended you install it for better performance.
Java Development Kit
We recommend installing JDK using Homebrew. Run the following commands in a Terminal after installing Homebrew:
If you have already installed JDK on your system, make sure it is JDK 8 or newer.
Node
Follow the installation instructions for your Linux distribution to install Node 8.3 or newer.
Node, Python2, JDK
We recommend installing Node and Python2 via Chocolatey, a popular package manager for Windows.
React Native also requires a recent version of the Java SE Development Kit (JDK), as well as Python 2. Both can be installed using Chocolatey.
Open an Administrator Command Prompt (right click Command Prompt and select 'Run as Administrator'), then run the following command:
If you have already installed Node on your system, make sure it is Node 8.3 or newer. If you already have a JDK on your system, make sure it is version 8 or newer.
React Application For Macos Mac
You can find additional installation options on Node's Downloads page.
Xcode & CocoaPods
The easiest way to install Xcode is via the Mac App Store. Installing Xcode will also install the iOS Simulator and all the necessary tools to build your iOS app.
If you have already installed Xcode on your system, make sure it is version 9.4 or newer.
Command Line Tools
You will also need to install the Xcode Command Line Tools. Open Xcode, then choose 'Preferences...' from the Xcode menu. Go to the Locations panel and install the tools by selecting the most recent version in the Command Line Tools dropdown.
Installing an iOS Simulator in Xcode
To install a simulator, open Xcode > Preferences... and select the Components tab. Select a simulator with the corresponding version of iOS you wish to use.
CocoaPods
CocoaPods is built with Ruby and it will be installable with the default Ruby available on macOS. You can use a Ruby Version manager, however we recommend that you use the standard Ruby available on macOS unless you know what you're doing.
Using the default Ruby install will require you to use
sudo
when installing gems. (This is only an issue for the duration of the gem installation, though.)For more information, please visit CocoaPods Getting Started guide.
Java Development Kit
React Native requires version 8 of the Java SE Development Kit (JDK). You may download and install OpenJDK from AdoptOpenJDK or your system packager. You may also Download and install Oracle JDK 8 if desired.
Android development environment
Setting up your development environment can be somewhat tedious if you're new to Android development. If you're already familiar with Android development, there are a few things you may need to configure. In either case, please make sure to carefully follow the next few steps.
1. Install Android Studio
Download and install Android Studio. Choose a 'Custom' setup when prompted to select an installation type. Make sure the boxes next to all of the following are checked:
Android SDK
Android SDK Platform
Performance (Intel ® HAXM)
(See here for AMD)Android Virtual Device
Android SDK
Android SDK Platform
Android Virtual Device
Then, click 'Next' to install all of these components.
If the checkboxes are grayed out, you will have a chance to install these components later on.
![React Application For Macos React Application For Macos](https://blogeduonix-2f3a.kxcdn.com/wp-content/uploads/2018/04/enter-project-name.png)
Once setup has finalized and you're presented with the Welcome screen, proceed to the next step.
2. Install the Android SDK
Android Studio installs the latest Android SDK by default. Building a React Native app with native code, however, requires the
Android 9 (Pie)
SDK in particular. Additional Android SDKs can be installed through the SDK Manager in Android Studio.The SDK Manager can be accessed from the 'Welcome to Android Studio' screen. Click on 'Configure', then select 'SDK Manager'.
The SDK Manager can also be found within the Android Studio 'Preferences' dialog, under Appearance & Behavior → System Settings → Android SDK.
Select the 'SDK Platforms' tab from within the SDK Manager, then check the box next to 'Show Package Details' in the bottom right corner. Look for and expand the
Android 9 (Pie)
entry, then make sure the following items are checked:Android SDK Platform 28
Intel x86 Atom_64 System Image
orGoogle APIs Intel x86 Atom System Image
Next, select the 'SDK Tools' tab and check the box next to 'Show Package Details' here as well. Look for and expand the 'Android SDK Build-Tools' entry, then make sure that
28.0.3
is selected.Finally, click 'Apply' to download and install the Android SDK and related build tools.
3. Configure the ANDROID_HOME environment variable
The React Native tools require some environment variables to be set up in order to build apps with native code.
Add the following lines to your
$HOME/.bash_profile
or $HOME/.bashrc
config file:.bash_profile
is specific to bash
. If you're using another shell, you will need to edit the appropriate shell-specific config file.Type
source $HOME/.bash_profile
to load the config into your current shell. Verify that ANDROID_HOME has been added to your path by running echo $PATH
.Please make sure you use the correct Android SDK path. You can find the actual location of the SDK in the Android Studio 'Preferences' dialog, under Appearance & Behavior → System Settings → Android SDK.
Open the System pane under System and Security in the Windows Control Panel, then click on Change settings.... Open the Advanced tab and click on Environment Variables.... Click on New... to create a new
ANDROID_HOME
user variable that points to the path to your Android SDK:The SDK is installed, by default, at the following location:
React Application For Macos Download
You can find the actual location of the SDK in the Android Studio 'Preferences' dialog, under Appearance & Behavior → System Settings → Android SDK.
Open a new Command Prompt window to ensure the new environment variable is loaded before proceeding to the next step.
4. Add platform-tools to Path
Open the System pane under System and Security in the Windows Control Panel, then click on Change settings.... Open the Advanced tab and click on Environment Variables.... Select the Path variable, then click Edit. Click New and add the path to platform-tools to the list.
The default location for this folder is:
Watchman
Follow the Watchman installation guide to compile and install Watchman from source.
Watchman is a tool by Facebook for watching changes in the filesystem. It is highly recommended you install it for better performance and increased compatibility in certain edge cases (translation: you may be able to get by without installing this, but your mileage may vary; installing this now may save you from a headache later).
React Native Command Line Interface
React Native has a built-in command line interface. Rather than install and manage a specific version of the CLI globally, we recommend you access the current version at runtime using
npx
, which ships with Node.js. With npx react-native <command>
, the current stable version of the CLI will be downloaded and executed at the time the command is run.Creating a new application
If you previously installed a global
react-native-cli
package, please remove it as it may cause unexpected issues.You can use React Native's built-in command line interface to generate a new project. Let's create a new React Native project called 'AwesomeProject':
This is not necessary if you are integrating React Native into an existing application, if you 'ejected' from Expo, or if you're adding iOS support to an existing React Native project (see Platform Specific Code). You can also use a third-party CLI to init your React Native app, such as Ignite CLI.
[Optional] Using a specific version or template
If you want to start a new project with a specific React Native version, you can use the
--version
argument:You can also start a project with a custom React Native template, like TypeScript, with
--template
argument:Creating a new application
If you previously installed a global
react-native-cli
package, please remove it as it may cause unexpected issues.React Native has a built-in command line interface, which you can use to generate a new project. You can access it without installing anything globally using
npx
, which ships with Node.js. Let's create a new React Native project called 'AwesomeProject':This is not necessary if you are integrating React Native into an existing application, if you 'ejected' from Expo, or if you're adding Android support to an existing React Native project (see Platform Specific Code). You can also use a third-party CLI to init your React Native app, such as Ignite CLI.
[Optional] Using a specific version or template
If you want to start a new project with a specific React Native version, you can use the
--version
argument:You can also start a project with a custom React Native template, like TypeScript, with
--template
argument:Preparing the Android device
You will need an Android device to run your React Native Android app. This can be either a physical Android device, or more commonly, you can use an Android Virtual Device which allows you to emulate an Android device on your computer.
Either way, you will need to prepare the device to run Android apps for development.
Using a physical device
If you have a physical Android device, you can use it for development in place of an AVD by plugging it in to your computer using a USB cable and following the instructions here.
Using a virtual device
If you use Android Studio to open
./AwesomeProject/android
, you can see the list of available Android Virtual Devices (AVDs) by opening the 'AVD Manager' from within Android Studio. Look for an icon that looks like this:If you have recently installed Android Studio, you will likely need to create a new AVD. Select 'Create Virtual Device...', then pick any Phone from the list and click 'Next', then select the Pie API Level 28 image.
We recommend configuring VM acceleration on your system to improve performance. Once you've followed those instructions, go back to the AVD Manager.
If you don't have HAXM installed, click on 'Install HAXM' or follow these instructions to set it up, then go back to the AVD Manager.
If you don't have HAXM installed, follow these instructions to set it up, then go back to the AVD Manager.
Click 'Next' then 'Finish' to create your AVD. At this point you should be able to click on the green triangle button next to your AVD to launch it, then proceed to the next step.
Running your React Native application
If you use the Yarn package manager, you can use
yarn
instead of npx
when running React Native commands inside an existing project.![React Application For Macos React Application For Macos](/uploads/1/2/6/5/126587625/137435169.png)
Run
npx react-native run-ios
inside your React Native project folder:You should see your new app running in the iOS Simulator shortly.
npx react-native run-ios
is one way to run your app. You can also run it directly from within Xcode.If you can't get this to work, see the Troubleshooting page.
Running on a device
The above command will automatically run your app on the iOS Simulator by default. If you want to run the app on an actual physical iOS device, please follow the instructions here.
Running your React Native application
If you use the Yarn package manager, you can use
yarn
instead of npx
when running React Native commands inside an existing project.Run
npx react-native run-android
inside your React Native project folder:If everything is set up correctly, you should see your new app running in your Android emulator shortly.
npx react-native run-android
is one way to run your app - you can also run it directly from within Android Studio.If you can't get this to work, see the Troubleshooting page.
Modifying your app
Now that you have successfully run the app, let's modify it.
React Application For Macos Windows 7
- Open
App.js
in your text editor of choice and edit some lines. - Hit
⌘R
in your iOS Simulator to reload the app and see your changes!
React Application For Macos Pc
- Open
App.js
in your text editor of choice and edit some lines. - Press the
R
key twice or selectReload
from the Developer Menu (⌘M
) to see your changes!
Modifying your app
Now that you have successfully run the app, let's modify it.
- Open
App.js
in your text editor of choice and edit some lines. - Press the
R
key twice or selectReload
from the Developer Menu (Ctrl + M
) to see your changes!
That's it!
Congratulations! You've successfully run and modified your first React Native app.
That's it!
Congratulations! You've successfully run and modified your first React Native app.
Now what?
- If you want to add this new React Native code to an existing application, check out the Integration guide.
If you're curious to learn more about React Native, continue on to the Tutorial.
React Application For Macos 10
Now what?
- If you want to add this new React Native code to an existing application, check out the Integration guide.
React App Macos
If you're curious to learn more about React Native, continue on to the Tutorial.